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, (1936.)
:
- - .APC (APC = C/Y)
2. ( ) APS (APS = S/Y)
APC + APS = 1
, , ( )
- , . MPC (MPC = ∆C/∆Y)
- , . MPS (MPS = ∆S/∆Y)
- : MPC + MPS = 1.
MPC + MPS = 1
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